Peel Hunt has lowered its target price on Laird, the manufacturer of antennas and other devices, to 160p from 185p, while keeping its "hold" recommendation on the stock.The broker is cautious ahead of Laird's next trading statement and wonders whether the company shouldn't have accepted a recent 200p-a-share offer from US rival Cooper."Whilst the structural growth drivers are obvious, the ability for Laird to protect its position/margins is less so," Peel Hunt notes.It notes that Laird trades at around 8.7 times estimated earnings for the current year, falling to 7.5 the following year.Specialist business media and events group Tarsus is among the latest batch of companies to see its target price shaved amid concerns over earnings.Singer Capital Markets has lowered its rating on Tarsus to 156p from 178p while keeping its "buy" rating on the stock.It has kept its estimates for 2011 unchanged but made a "small reduction" to 2012's."Looking to 2012 we highlight that a range of exhibition operators are seeing strong re-booking rates for the period," the broker said. "This suggests that even if global macro is tough in 2012 the trade exhibition sector (which is late cycle) will continue to enjoy momentum."Seymour Pierce has retained its "buy" recommendation on the Asia-facing bank Standard Chartered following the company's reiteration of double-digit growth.The broker also took note of chief executive Peter Sands's concerns over "the unintended consequences of regulation".Seymour Pierce has a 2,020p target price on Standard Chartered.